Typescript Tooling Migration
Arize-ai/phoenix
Migrate or upgrade TypeScript tooling in the Phoenix monorepo.
Anthony Fu's opinionated tooling and conventions for JavaScript/TypeScript projects.
Install Antfu
$ npx skills add JetBrains/skills --skill antfu -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install JetBrains/skills antfu --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/JetBrains/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/antfu .claude/skills/antfu && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "antfu" agent skill from https://github.com/JetBrains/skills/tree/main/antfu into .claude/skills/antfu/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "antfu", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/JetBrains/skills/tree/main/antfuType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add JetBrains/skills --skill antfu -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install JetBrains/skills antfu --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/JetBrains/skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/antfu .agents/skills/antfu && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "antfu" agent skill from https://github.com/JetBrains/skills/tree/main/antfu into .agents/skills/antfu/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "antfu", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add JetBrains/skills --skill antfu -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install JetBrains/skills antfu --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/JetBrains/skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/antfu .cursor/skills/antfu && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "antfu" agent skill from https://github.com/JetBrains/skills/tree/main/antfu into .cursor/skills/antfu/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "antfu", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/JetBrains/skills.git --path antfu--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add JetBrains/skills --skill antfu -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install JetBrains/skills antfu --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/JetBrains/skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/antfu .gemini/skills/antfu && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "antfu" agent skill from https://github.com/JetBrains/skills/tree/main/antfu into .gemini/skills/antfu/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "antfu", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install JetBrains/skills antfuInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add JetBrains/skills --skill antfu -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/JetBrains/skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/antfu .github/skills/antfu && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "antfu" agent skill from https://github.com/JetBrains/skills/tree/main/antfu into .github/skills/antfu/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "antfu", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add JetBrains/skills --skill antfu -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install JetBrains/skills antfu --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/JetBrains/skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/antfu .opencode/skills/antfu && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "antfu" agent skill from https://github.com/JetBrains/skills/tree/main/antfu into .opencode/skills/antfu/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "antfu", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
antfu- GitHub stars
- 366
- Used in
- 4 other repos
- Token cost
- ~1k tokens
- SKILL.md length
- 307 words
- Files
- 6 (incl. references)
- Skills in repo
- 76
- Repo updated
- First seen
- Licence
- None found
At a glance
Anthony Fu's opinionated tooling and conventions for JavaScript/TypeScript projects.
- Setting up new projects
- SKILL.md covers Coding Practices, Tooling Choices and References
- Calls pnpm
- Configuring ESLint/Prettier alternatives
What it does
Antfu is an agent skill from JetBrains/skills, published by the product's own GitHub organization. Anthony Fu's opinionated tooling and conventions for JavaScript/TypeScript projects. Use when setting up new projects, configuring ESLint/Prettier alternatives, monorepos, library publishing, or when the user mentions Anthony Fu's preferences.
Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including reference files (for example `references/antfu-eslint-config.md`, `references/app-development.md` and `references/library-development.md`).
It sits in Development, covering Linting and formatting and Monorepo tooling. It works with ESLint, TypeScript, Prettier and JavaScript. The repository describes itself as: Curated agent skills collection verified by JetBrains.
When your agent uses it
- Setting up new projects
- Configuring ESLint/Prettier alternatives
- Library publishing
- The user mentions Anthony Fus preferences
Example prompts
- “/antfu”
Requirements
- Node.js
What it can do on your machine
Read from SKILL.md and the folder at commit e0f258b. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
pnpm
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use pnpm, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Antfu loads about 1k tokens when it runs, and up to ~4.3k if it reads all its reference files. Until then it costs about 62 tokens; SKILL.md has 307 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 307 words (~1,018 tokens).
“When completing tasks, run pnpm run lint --fix to format the code and fix coding style.”
- name
- antfu
- metadata.short-description
- Apply Anthony Fu's TS/JS conventions
- metadata.author
- Anthony Fu
- metadata.version
- 2026.02.03
- metadata.source
- https://github.com/antfu/skills/tree/main/skills/antfu
Files
SKILL.md and 5 other files (references) in antfu of JetBrains/skills.
- SKILL.md
- references/antfu-eslint-config.md
- references/app-development.md
- references/library-development.md
- references/monorepo.md
- references/setting-up.md
Open the folder on GitHubat commit e0f258b
Used in 4 other repositories
We found 4 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 4 other GitHub owners. This page covers the copy in JetBrains/skills, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Antfu next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Antfu this skillJetBrains/skills | 366 | 4 repos | ~1k | Automated safety check: Pass | None | |
| Typescript Tooling MigrationArize-ai/phoenix | 12k | — | ~2.8k | Automated safety check: Pass | Apache-2.0 | |
| Monorepoavibebuilder/claude-prime | 120 | — | ~1.2k | Automated safety check: Pass | MIT | |
| Code Qualityredis/RedisInsight | 8.9k | — | ~1.2k | Automated safety check: Pass | Custom licence | |
| Pnpm Engineteambit/bit | 18k | — | ~1.9k | Automated safety check: Pass | Custom licence | |
| Ultraciteagustinusnathaniel/nextarter-tailwind | 125 | 2 repos | ~1.2k | Automated safety check: Pass | MIT |
Similar skills
Monorepo
avibebuilder/claude-prime
MUST use for ANY query mentioning packages, monorepo, workspace, catalog, turbo, turborepo, or pnpm in a multi-package context.
- Official
Code Quality
redis/RedisInsight
Code-quality standards for RedisInsight: TypeScript strictness, naming conventions (camelCase, PascalCase, UPPERSNAKECASE), linting rules, no any without reason, no !important in styles, and…
Pnpm Engine
teambit/bit
Work on the pnpm Rust engine (@pnpm/napi, the pacquet crates) that bit install runs through.
Ultracite
agustinusnathaniel/nextarter-tailwind
Ultracite is a zero-config linting and formatting preset for JavaScript/TypeScript projects.
Port Rule
web-infra-dev/rslint
Port a new ESLint core or plugin rule to rslint, including explicitly requested batches.
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Related
Works with
Categories
Questions about Antfu
What does Antfu do?
Anthony Fu's opinionated tooling and conventions for JavaScript/TypeScript projects. Antfu is an agent skill from JetBrains/skills, published by the product's own GitHub organization. Anthony Fu's opinionated tooling and conventions for JavaScript/TypeScript projects.
When should I use Antfu?
Antfu fits situations like: setting up new projects; configuring ESLint/Prettier alternatives; library publishing; the user mentions Anthony Fus preferences.
How do I install Antfu in Claude Code?
Run `npx skills add JetBrains/skills --skill antfu -a claude-code`. Or copy the skill folder (antfu in JetBrains/skills) into .claude/skills/antfu in your project. Claude Code loads it when a task matches its description.
How do I install Antfu in Codex?
Run `npx skills add JetBrains/skills --skill antfu -a codex`. Or copy the skill folder (antfu in JetBrains/skills) into .agents/skills/antfu in your project. Codex loads it when a task matches its description.
Can I use Antfu in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add JetBrains/skills --skill antfu -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/antfu, .gemini/skills/antfu, .github/skills/antfu and .opencode/skills/antfu in your project.
What does Antfu need to run?
Going by SKILL.md and its folder, Antfu needs the command-line tools its instructions call (pnpm). Our summary lists: Node.js.
Does Antfu access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Antfu safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Antfu use?
No licence was found for Antfu or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Antfu use?
About 1k tokens (SKILL.md is roughly 4.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 3.3k tokens, read only when the agent opens those files.
What are the alternatives to Antfu?
Skills that share tags, products or a category with Antfu: Typescript Tooling Migration (Arize-ai/phoenix, 12k stars), Monorepo (avibebuilder/claude-prime, 120 stars), Code Quality (redis/RedisInsight, 8.9k stars) and Pnpm Engine (teambit/bit, 18k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Antfu?
JetBrains (a GitHub organization, an official publisher) maintains it in JetBrains/skills, which has 366 GitHub stars. The repository holds 76 skills in this directory. The repository was last updated on June 29, 2026.
Source: JetBrains/skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.